Replace bn.js with BigInt

[gtsonevv]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• Commit messages follow the conventional commits spec
• If this is a code change: I have written unit tests.
• If this changes code in a published package: I have run pnpm changeset to create a changeset JSON document appropriate for this change.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

Reduce amount of dependencies.

Test Plan

Related issues/PRs

#1217
#1200

[changeset-bot]

🦋 Changeset detected

Latest commit: f7c541e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 14 packages

Name	Type
near-api-js	Major
@near-js/accounts	Minor
@near-js/transactions	Minor
@near-js/types	Minor
@near-js/utils	Minor
@near-js/biometric-ed25519	Patch
@near-js/cookbook	Patch
@near-js/crypto	Patch
@near-js/providers	Patch
@near-js/wallet-account	Patch
@near-js/keystores	Patch
@near-js/keystores-browser	Patch
@near-js/keystores-node	Patch
@near-js/signers	Patch

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[gagdiez]

Please see all my comments above

[gagdiez]

How is that the tests are not catching problems here? for example, the change of BN(10).exp(24) to BigInt(10**24) should have broke a bunch of stuff (since it is in the utils.js module, that every other module uses).

Wrongly changing it to BigInt(10**24) == 999999999999999983222784n should have broke a lot of tests... or is just that we do not have thorough testing? (in which case, we should implement it)

[vikinatora]

Some nitpicks but looks very good

[gtsonevv]

Hey @gagdiez , this PR is ready for review. Merging is blocked until you approve it because you requested changes.

[gagdiez]

@gtsonevv

I am still puzzled about the tests, and why they didn't fail. Specially on the format file.

We need to find an explanation, and add more tests if necessary.

If I am being picky with this PR is because a rounding error could lead to real people losing real money.

[gagdiez]

@gtsonevv LGTM

[vikinatora]

Delaying the merge of this PR intentionally, because we want to batch these breaking changes with other oustanding breaking changes, in order to not increment major versions unnecessarily.